VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1929-1932 spark plugs, and carb issue

Hello everyone

Was told to use AC-C86 plugs in my 1930 coach. My local parts store said can't get those but crossed them to NGK 2910. Anyone used these before or have any other recomendations?

Secondly, my car is running real rich lately. I drove it to work today and it died when I got there and failed to restart. I got it to start at lunch time but it spewed gas out of the air cleaner in the process, and kinda seemed to be running even richer. I really don't know what to do I am thinking the float is sticking or something.

Any advice would be greatly appreciated

The AC-C86 plug has been replaced by the AC-C87 plug, which is still available. You can order them from your auto parts store or buy them from the Filling Station in Lebanon, Oregon.

On the carburetor, your flooding problem could be several things. You could have a piece of dirt under the float needle which is holding the needle open. Your float could have a small hole thus it is filling with gasoline, or your float needle could have a Viton tip which is defective thus allowing the carburetor to flood.

You can remove the float bowl and check all of the above.

Thanks Dog,

I found dirt stuck on the viton needle. I didn't make it home from work I had to pull the bowl and such on the side of the road, lol. Thank god for simple old cars if it was a newer car I would of never made it home. I'll check on those plugs tonight. Do you still gap them at 40 and advance the timing to 18 degrees?

Yes.

Good going on the needle. If your fuel system isn't clean it could happen again, but at least next time you will know where to look for the problem.

Glad that you made it home!

my fuel system seems to be clean, I just changed the fuel filter not to long ago though maybe I knocked some debree loose.

Thanks agian

I am using the Ac C87 plug in my 31 chev. It runs great. I got them atthe O'Reilly auto parts store.

I just ordered some C87 plugs from advance, the ones that are in my car now are champions. Do you think it will run better with the a/c plugs?

With the plugs gapped at .040"......yes.

You will notice the difference immediately. You may want to add a second fuel filter. I have one at the fuel tank and a second between the fuel pump and carb (i used the small kind-same as on my Harley).

Suggest that you stay with only one extra inline fuel filter. With two inline filters, plus the filter in the fuel pump, you will tend to have an extra restriction for your mechanical fuel pump to deal with.

I agree with JYD, and have it located handy to change, and change it every other oil change with a clean system, and a whole lot more often if you are having problems with junk, crud, or rust in your carb. Use a full sized metal cased one, don't use one of those small clear plastic jobs on top of the engine where it can break and cause a fire!

I just have the one inline filter it is located right before the fuel pump. The fuel pump glass bowl has a white stone filter in it is this normal? I have 2 spare fuel pumps I have located and neither of the have anything in the glass bowl.

I don't see a reason for 2 filters if the first one don't catch it who is to say the second one will?

If anything I was thinking about some sort of air filter beings the original doesn't really have a filter.

No! The stock AC-405 fuel pump had a wire mesh filter screen in the top cover above the glass bowl.



The 1930 models had an air filter as standard equipment.

Air filters for 1929 and 1930
[img][IMG]http://i1190.photobucket.com/albums/z441/karl439/airfilter.jpg[/img][/img]

I know there is an air cleaner, I have that but there is no "element" in it. Is there supposed to be a filter element in it? Mine doesn't have anything inside of it it is just open

no element. nothing in it. not too efficient.mike

The air cleaner was not designed for an element. The cleaner works on centrifugal force. The fins on the air cleaner causes the air to swirl and the centrifugal force throws the dust particles out through the slot on the bottom of the air cleaner....or that is the theory behind that type of air cleaner anyway.

This is why I was thinking of finding some sort of air cleaner with a filter, or think I should not worry about it?

Don't worry about it. Unless you are going to drive across the Gobi Desert like DanR did with his 1930 coupe, the stock air cleaner should do the job the way it is.

good deal, I think I read somewhere that the air cleaner was designed from a cream separator or something like that

The incoming air is spun cyclone wise and the heavyer particles spin out of the air stream, that is the theory anyway, neat ain't it?

On an old tired engine, an air filter is probably too late anyway. On a fresh engine, I would protect my investment and replace that tin can air centrifuge with something that really works.
Put the original back on for judging, otherwise set it on the shelf and use a good paper filter.

considering the "roads" these cars were used on 80 odd years ago versus what we have today, the old stuff will probably strain out the problem particles anyway. think how many thousands of miles your paper filter lasts in your newer car .

The original has worked fine for me, it has lasted 57,000 miles and 83 years on my '28 it works really well under the car cover in the garage for the last two years!